Peronospora agrestis Gäumann, 1918

on Veronica

Veronica arvensis, Belgium, prov. Antwerp, Mol, 1.v.2023 © Carina Van Steenwinkel

dead leaf with down

conidiophore

conidium

gall

leaves pale, may be disfigured. Underside with a greyish-violet down, consisting of 0.6 mm high erect conidiophores that apically several times are dichotomously branching, each terminal branch ending in a conidium.

host plants

Plantaginaceae, monophagous

Veronica agrestis, arvensis, chamaedrys, dillenii, filiformis, persica, polita, praecox, verna.

The list of host plant species is based on Klenke & Scholler.

references

Belbahri, Calmin, Pawlowski & Lefort (2005a), Brandenburger (1985aL 576), Buhr (1965a), Chater, Woods, Stringer, ao (2020a), Doppelbaur & Dobbelbaur(1973a), Doppelbaur, Huber & Poelt (1965a), Göker, García-Blázquez, Voglmayr ao (2009a), Gustavsson (1991a), Jage, Klenke, Kruse ao (2017a), Klenke & Scholler (2015a), Kozłowska, Mułenko & Heluta (2015a), Kruse (2014a, 2019a), Müller (2015a), Müller & Kokeš (2008a), Ruszkiewicz-Michalska (2006a), Ruszkiewicz-Michalska & Michalski (2005a), Sävulescu (1948a), Voglmayr (2003a).